HOWTO: Get system information on Linux

1) Summary table of CPU, Memory, Disk, OS and Graphics card information

Launch Konqueror with sysinfo:/ in location bar
Same as clicking on My Computer on Desktop

2) Operating system version information

cat /etc/SuSE-release

OR

ls -l /etc/*release
cat   /etc/*release

3) Linux Kernel Version

uname -r

4) Detailed CPU information

cat /proc/cpuinfo

5) Detailed GPU information

/sbin/lspci
/sbin/lspci -v -s "<slot_name>"

6) Detailed Memory information

cat /proc/meminfo

7) Simple Memory information

free -m

HOWTO: Get CPU information on macOS

1) Operating system

sw_vers

2) Detailed CPU information

sysctl -n machdep.cpu.brand_string

3) Darwin kernel version

uname -a